<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>案例-头像上传</title>
    <link rel="stylesheet" href="./lib/bootstrap-v4.6.0.css" />
    <style>
      .thumb-box {
        text-align: center;
        margin-top: 50px;
      }

      .thumb {
        width: 150px;
        height: 150px;
        object-fit: cover;
        border-radius: 50%;
      }
    </style>
  </head>

  <body>
    <div class="thumb-box">
      <!-- 头像 -->
      <img src="./images/cover.jpg" class="img-thumbnail thumb" alt="" />
      <div class="mt-2">
        <!-- 文件选择框 -->
        <!-- accept 属性表示可选择的文件类型 -->
        <!-- image/* 表示只允许选择图片类型的文件 -->
        <input type="file" id="iptFile" accept="image/*" style="display: none" />
        <!-- 选择头像图片的按钮 -->
        <button class="btn btn-primary" id="btnChoose">选择 & 上传图片</button>
      </div>
    </div>
    <script src="../axios.js"></script>
    <script>
 const file = document.querySelector('#iptFile');
 const img = document.querySelector('.thumb');
const btn = document.querySelector('#btnChoose');
btn.addEventListener('click', function(){
  file.click()
})
file.addEventListener('change', function(){
  if(!this.files[0]) return alert('请传入照片')

const fd = new FormData()
  fd.append('avatar',this.files[0])
  axios.post('http://ajax-api.itheima.net/api/file',fd)
  .then(({data:res}) => {
    const url = res.data.url
    img.src = url

  })
})
    </script>
  </body>
</html>
